Split File

#!/usr/bin/python
# coding: utf-8
import re
import sys
lines = u''.join(open(sys.argv[1]))
re = re.compile(r'(?m)<idnumber>\s+(\d+)\s+<value>\s+\d+')
for m in re.finditer(lines):
  with open(u'{}.txt'.format(m.group(1)), 'w') as out:
    out.write(u"{}\n".format(m.group()))